span {
    color: red;
}

p {
    font-size: 20px;
    color: aquamarine;
    background-color: orange;
    width: 80%;
    height: 50px;
    line-height: 50px;
    border-radius: 5px;
}

img {
    margin-bottom: 15px;
}

body {
    position: relative;
}

.header {
    position: fixed;
    height: 50%;
    width: 150px;
    top: calc((100% - 50%) / 2);
    right: 20px;
}

#content {
    position: absolute;
    display: block;
    width: 100%;
    height: 900px;
    margin: 0 auto;
}

#left {
    width: 80%;
    height: 100%;
    margin-left: 50px;
    display: block;
    overflow-y: scroll;
    overflow-x: scroll;
}

#content1 {
    width: 100%;
    margin: 5px auto;
}
